OK, lets start off with something easy.

With an above ground vinyl pool 18x40x54 with the temperature at 90 degrees with very little rain. Using a solar blanket at night and solar panels on the roof during the day. Assuming a chlorine pool using a double filtration system consisting of a 300 lb sand filter and then a 150 cf cartridge filter.

What Chlorine level and Ph should I be striving for before I go on to anything else.

Aranon